Welded frame and bedplate for vertical piston machines



July 8, T. v. HEMMINGSEN 2,248,681

WELDED FRAME AND BEDPLATE FOR VERTICAL PISTON MACHINES Filed Dec. 27, 1938 Ira 1:77 a)" WWji? Patented July 8, 1941 Torkild Valdemar Hemmingsen, Copenhagen,

Denmark Application December 2'7, 1938, Serial No. 248,018

In Denmark December 20, 1937 2 Claims.

The present invention relates to a welded construction constituting a frame integral with a bedplate for vertical piston machines, particularly internal combustion engines, and the invention is calculated to provide such a combination frame and bedplate made up from standard commercial profiles such as plates and sections so that the construction becomes relatively simple and inexpensive in manufacture, being, at the same time, comparatively light in weight, notwithstanding its great strength.

According to the invention the frame and bedplate of a vertical piston machine are composed of a number of units, normally one unit more than the number of cylinders, and each such unit comprises a vertical or substantially vertical girder on each side of a main bearing and serving to transmit the gas pressures, and a'transverse girder arranged for afiixture to the foundation and on to which the bottom ends of the vertical girders are we1dedand of inclined outer girders which connect the top ends of the vertical girders with the lower transverse girder at or in the vicinity of the ends of the latter. The main bearing which is arranged between the vertical girders and the transverse girder which forms a kind of bedplate in the frame, is welded in in the centre of the transverse girder which is, preferably, cut out corresponding to the bearing, whereby the vertical girders in conjunction with the centre portion of the transverse girder and the main bearing will constitute a welded, U-shaped assembly into which the crank shaft may be lowered from above.

The invention is elucidated on the accompanying drawing, on which Fig. 1 shows schematically a constructional form for a frame and bedplate unit according to 'the invention, seen in the axial direction of the crankshaft,

Fig. 2, a portion of the frame according to Fig. 1, viewed in section of the line IIII, and

Fig. 3, a portion of the substance of Fig. 1, in a slightly modified execution.

The frame portionfor each cylinder unit, or rather each frame portion or unit as shown in Fig. 2, comprises in the first place a pair of vertical lattice rods or girders I which are arranged,

one on each side of a main bearing 4 and serve to absorb the vertically acting forces deriving from the piston movement (the piston pressures or gas pressures). In the constructional form shown, each girder I is composed of two channel irons arranged web to web. On to the extreme top of each of the said girders I is welded The channel irons' in-each of the'girders, I

are welded on, opposite. sides of the vertical webin a T-section 3 or a girder of T-profile extending horizontally at right angles to the crank shaft some distance beyond the girders I. The girders I are at the bottom likewise welded onto the upwardly facing side of the horizontal flange of the transverse girder 3, this flange serving for the aflixture of the frame on to the foundation. The main bearing 4 is welded into the centre of the transverse girder 3 between the girders I, the vertical web of the transverse girder 3 being here cut away to conform with the bearing.

From the elements I I issue inclined lattice rods 5 to the ends of the transverse girder 3. These lattice rods 5, which serve to absorb the forces of acceleration, consist in the constructional form shown of channel irons arranged in such a manner that their webs form the exterior sides of the frame, the flanges serving for the afiixture of a door or wicket between the lattice rods 5.

The elements II, the girders I and the transverse girder 3 may further, if desired, be interconnected as shown by means of inclined lattice rods IM and I2b which, even though they might per se be dispensed with, yield additional side stiffness to the frame proper. These rods, which in the constructional form shown are made of channel irons, are further utilised for the strengthening or reinforcing of the transverse girder 3, the rods I 20, being welded on to the same and each on to one of the vertical girders I as shown in Fig. 1, whereas the rods I 2b are arranged between the vertical girders I, being at the bottom affixed to the girders proper and at the top to the elements I I welded on to these same girders. The joints are here bolt joints with reamed bolt holes, this because it must be possible to remove the rods I 2b when the crank shaft is to be placed in position, or when it is desired to take it out.

The various frame members are joined mutually by means of plate 6 extending parallel to the axis of the crank shaft and welded in between eachtwo successive transverse girders 3. in the vicinity of the latters extreme ends. The plates 6 may be inclined as shown and they form, in conjunction with an oil tray 8, the lower part of the crank casing. The said oil tray may be Welded on to the transverse girders 3 and the plates 6. The latter may at the top have a bend ing in (shown in two slightly varying forms on the left and right hand sides in Figs. 1 and 2) serving for the afiixture and tightening of doors or wickets arranged between each two successive frame members.

The construction may, however, for this purpose be executed otherwise, for example as shown in Fig. 3 where channel irons l are welded on along the upper edge of the plates 6.

Finally there is on each side of the frame members welded a through T-section l3 extending in the axial direction of the crank shaft and forming a gutter and a support for the floor plate.

The construction shown and described shall 7 only serve as an example to illustrate th principle of the invention, the details admitting of modifications in different ways within the scope of the invention.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare that what I claim is:

1. A welded frame and bedplate for vertical piston machines being composed of a number of units, each unit comprising a main bearing, substantially vertical girders for transmission or the gas pressures from the cylinder to the main bearing and disposed one on either side of said main bearing, a transverse girder mainly of T-section and having its web arrangedvvertically adapted for aflixture to the foundations and being cut-away medially to receive and secure the main bearing by welding, the lower ends of the vertical girders being welded to the sides of the vertical web of the transverse girder, and two inclined outer girders connecting the top ends of the vertical girders with the transverse girder in the vicinity of the extremities of the latter, said inclined outer girders being each welded to the transverse girder along the vertical web of the same.

2. A frame and bedplate according to claim 1 having inclined lattice rods disposed between the two vertical girders and serving for additional stiifening of the frame, said lattice rods being affixed by means of bolted joints whereby they may be removed when the crank shaft is installed or removed from the main bearing lying between the two vertical girders.

TQRKILD VALDEMAR HEMMINGSEN. 

